3v4l.org

run code in 300+ PHP versions simultaneously
<?php class FOO { public $f; } class BAR { public $f; } while(1) { $a = new FOO(); $b = new BAR(); $a->f = $b; $b->f = $a; print "Memory usage: " . number_format(memory_get_usage(true)) . " bytes\n"; unset($a); unset($b); }

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
7.1.70.0030.00617.16
7.1.60.0130.00319.27
7.1.50.0100.01434.71
7.0.200.0030.00717.04
preferences:
33.12 ms | 401 KiB | 5 Q